5/10 PLO live

Several players limp, I check my big blind with JJ53ds.

Flop J76r

I check. I realize leading is a good option, but my gameplan massively multi-way oop with aggressive players behind is to usually start with a check.

Player A (1500) suspected weak tight pots for 60.

Player B (5k+) loose, tough calls.

Player C (5k+) splashy but intelligent and capable of reading hands, raises to 210 OTB.

I (5k) ?

In the hand I ended up raising and everyone folded, but I wasn't happy with my play. It just felt like I was turning my hand face up with too much money behind. Calling has the advantage of allowing the possibility that the shorter stack shoves and I end up getting all in with one of the deep stacks, which isn't especially likely, but is insanely good for me if it happens. It also gives me a bit of deception, although I don't exactly look weak cold calling. Agreed that flatting is a better play?

How do you play your ranges here? Do you have a flatting range and a raising range? What goes in each? Do I need to develop a leading range here?